GMSMON-17 WILLISTON RESERVOIR TRIBUTARY - BC Hydro

May 22, 2012
Report No. 1114920016-R-Rev0-2000 8
GMSMON-17 WILLISTON RESERVOIR TRIBUTARY HABITAT
REVIEW
two people netting fish. Sampling crews were consistent for all removal passes at each site to keep capture
efficiency consistent between passes. Each site was sampled from downstream to upstream. Captured fish were
transferred to buckets set along the side of the sample reach. Fish observed but not captured were recorded,
including the species and estimated length when possible. Sampling effort (i.e., seconds of electrofisher
operation) was recorded during each removal pass. All captured fish were enumerated, identified to species,
measured for fork length (to the nearest 1 mm) and weighed (to the nearest 1 g). Scale samples were collected
from salmonid species and stored in scale envelopes. After processing fish from the first electrofishing pass, a
second pass was conducted in the same manner. Because of low catch rates of fish in the study sites, only
two electrofishing passes were conducted at most sites, with only one pass at sites with no fish or very few fish
captured (see Results Section 3.0). After all electrofishing passes were completed, fish were released back into
the creek within the sample site.
Table 4 provides detailed information on the sample sites, site conditions, sampling effort, and electrofisher
settings used during the sampling. Maps 2 to 5 in Appendix A show the location of the block nets in each of the
sampled tributaries.